Ng-sortgrid

![angular10]()

!Logo

!Grid demo

- -

Table of Contents generated with DocToc

- Ng-sortgrid
- Getting started
- Download
- Apply the directive
- React on changes
- Group sortgrids
- Use the async pipe
- Style your items on different events
- Integrate the build in CSS
- Scrolling
- Custom scroll points
- Scroll speed (default 50)
- API
- Inputs
- Outputs
- Mobile usage

Download

``
npm i ng-sortgrid
`

Import the `NgsgModule` in your `AppModule`.

`
import {NgsgModule} from 'ng-sortgrid'
...
@NgModule({
imports: [BrowserModule, NgsgModule],
//...
})
...
`

Apply the directive

Loop over your elements with *ngFor. 🛎️ the items needs to be an array. Alternate you can also use the async pipe to pass in your items.

!Grid demo

Apply the ngSortgridItem directive

!Grid demo

React on changes

In most cases you are interested in the new sort order. Often you want to store them in local storage or even send them to the backend. To do so the following two steps are needed in addition to the "Getting started" step.

Pass your items to the directive via the ngSortGridItems input.

!Grid demo
React on the 'sorted' output event. The sorted output event emits a NgsgOrderChange which contains the previousOrder and the currentOrder

!Grid demo

Group sortgrids

In case you have more than one sortgriditem on the page you need to group the sortgriditems to avoid dropping drags from one group in another group.
Pass in a unique name to the ngSortGridGroup input

!Grid demo

Use the async pipe

You can also use the async pipe to display items

!Grid demo

Style your items on different events

The ng-sortgrid adds different classes on different events to your items. You can either use those classes to style the appereance
of your items on certain events or you can include the build in CSS from the ng-sortgrid library.

Integrate the build in CSS

To integrate the built in Stylesheet just import in in your angular.json.

`
"styles": [
"node_modules/ng-sortgrid/styles/ngsg.css",
],
``

Alternative you can provide custom styles for the different classes listed bellow

| Class | Description |
|-------------------|------------------------------------------------------------------------------------------------------------------------------------------------|
| ng-sg-placeholder | This class is added to the placeholder item which previews where the item is inserted |
| ng-sg-dropped | This class is added as soon after you drop an item. The class will be on the item for 500 milliseconds before it gets removed |
| ng-sg-selected | This class is added when you press the CMD or the Ctrl Key and Click on an item. It indicates which items are selected for the multi drag&drop |
| ng-sg-active | This class is added when dragging item| |

Scrolling

The ng-sortgrid has a autoScroll flag which you can use to enable autoScroll. If you enable autoScroll the screen will start to scroll
in the following scenario.

!Grid demo

- If you drag an element in the top 50px of the screen
- If you drag an element in the bottom 50px of the screen

Custom scroll points

Sometimes its not enough to only scroll once you drag over the top view port border. Imagine that you have a fixed navbar
at the top of your page. In this case you need to scroll once you drag an element over the navbar.

Scroll speed (default 50)

The scrollSpeed property accepts a number and allows you to specify the scrolling speed.

Check out the scroll demo

API

Inputs

| Value | Description | Default|
|-------------------|------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| ngSortGridGroup: string | Groups a grid - avoids that items from one grid can be dragged to another grid |undefined|
| ngSortGridItems: any[] | Sort grid items. Pass down a list of all your items. This list is needed to enable the sorting feature.|undefined|
| autoScroll: boolean | Flag to enable autoscrolling|false|
| scrollPointTop: number | Custom top scrollpoint in pixels|if autoscroll is applied we start scrolling if we pass the top border|
| scrollPointBottom: number | Custom bottom scrollpoint in pixels|if autoscroll is applied we start scrolling if we pass the bottom border|
| scrollSpeed: number | Scrollspeed, the higher the value, the higher we scroll.|50 - only applies if autoscrolling is on|

Outputs

| Value | Description | Default|
|-------------------|------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| sorted: EventEmitter | Emits an event after we sorted the items, each event is of type NgsgOrderChange. The NgsgOrderChange contains the previousOrder and the currentOrder. Both are freshly created arrays. |undefined|

Mobile usage

If you want to use those events on mobile you probably have to use some polyfills in order to emit all the needed events. Including this polyfill in your app should do the trick. https://github.com/timruffles/mobile-drag-drop.